Angle-bending machine



S. D. RONALD.

ANGLE BENDING MACHINE.

APPLICATION FILED DEC. 4. 191a.

Patented Apr. 26, 1921.

4 SHEETS-SHEET l.

. A TTOR/VE Y8 S. D. RONALD.

ANGL BENDING MACHINE.

APPLICATION FILED DEC- 4,1918

Patented Apr. 26, 1921.

Ill/VENTOR A TTOR/VEYS S. D. RONALD.

ANGLE BENDING MACHINE.

APPLICATION mepmc. 4. 1918.

L 2. 93 n 6 nu M4 INVENTOR A TTOR/VEYS S. D. RONALD.

ANGLE BENDING MACHINE. APPLICATION man mac. 4, 191a.

Patented Apr. 26,1921.

4 SHEETSSHEET 4.

I/V VE TOR A TTOR/VEVS SAMUEL D. RONALD, 0F SAN FRANCISCO, CALIFORNIA, ASSIGNOR T0 BETHLEHEM SHIEB'UILQQNG CORPORATION, LTD, 033 BETHLEHEM, PENNSYLVANIA, A COR- ronnrron or DELAWARE.

ANGLE-BENDING .MACHINE.

Specification of Letters Patent.

Patented Apr. 2%., 1921.

Application filed December 1, 1918. Serial No 265,199.

To ZZ whom it may concern:

Be it known that I, SAMUEL D. RONALD, a citizen of the United States, residing at San Francisco, county oi San Francisco, State of California, have invented a new and use- I ful Angle-Bending Machine, of which the following is a specification.

In forming and rolling machines as heretofore constructed considerable difficulty has arisen owing to the overheating of the bending roll since it is customary to heat the angle or other bars of metal before they are bent and in some cases valuable time is lost in waiting for the bending rolls to cool oil.

In accordance with my present invention, I employ a plurality oi rolls which are carried by a rotatable tool carrying head which is capable oi vertical adjustment and which is supported on a carriage which is capable of lateral adjustment.

With the above in view my invention consists of a novel construction and arrange ment of a bending machine which is especially adapted for the bending of angle bars, although as is apparent it is not limited to such use but may be'emploved for the bending into a desired form of any desired contour of metal or other bars.

My invention further consists of a novel construction of a bending roll and a novel construction of die with which said bending roll cooperates.

It further consists of novel means for etfecting the proper adjustment of a bending roll.

ther novel features of construction and advantage will hereinafter more clearly appear in the detailed description of my invention.

For the purpose of illustrating my invention 1 have shown in the accompanying drawings a typical embodiment of it which in practice will give satisfactory and reliable results. t is, however, to be understood that this embodiment is typical only and that the various instrumentalities oil which my invention consists can be variously arranged andorganized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein set forth.

Figure 1 represents, in front elevation, an angle bending machine embodying my invention.

Fig. 2 represents a side elevation of the machine.

Fig. 3 represents a section on line 3-3 of l represents a section on line l l of 5. ig. 5 represents a section on line 55 of g. 4:. Similar numerals of reference indicate corresponding parts.

Referring to the drawings,

1 designates the base of a vertical boring mill of any desired or conventional type which is provided in the usual manner with a rotary table 2 having any desired means for effecting and controlling its rotation such as are well known in the art. In the form illustrated the construction just described is of the Bullard boring mill type. In this type of mill the table rotates and the working tool is stationary. The base 1 has rising from it a standard 3 having a laterally extending portion to which are connected end bars a. The end bars 4: are connected by cross bars 5 and 6 on which a carriage 7 is slidable. 8 designates a nut on the carriage, see Fig. 4, adapted to receive a feed screw 9 which is journaled in the end bars 4. The feed screw 9 is manually adjusted to laterally position the carriage 7, the free end of said screw having a polygonal con tour to adapt it to receive a working tool. The front face of the carriage is provided with guide-plates 10 which form vertical slots 11 in order to receive therein an adjustable slide 12. The slide 12 has, at its rear, a rack 13 which engages with a pinion 14 which has a key 15 which extends into the longitudinally extending keyway 16 or" a shaft 17 on which said pinion 14: is loosely mounted, so that it will not interfere with the lateral adjustment of the carriage 7. The shaft 17 is journaled in the end bars 4 and has its free end of a polygonal contour to adapt it to receive a tool to rotate the shaft 17 and thereby effect the vertical adjustment of the head 12. The pinion 17 is mounted between straps 18 secured to the carriage 7.

19 designates a stud shaft at the lower end of the head 12, and rotatably adjustable on the stud-shaft 19 is a tool carrying head 20 which is fixed in its adjusted position by means of a nut 21 on the end of the stud-shaft 19. 22 designates studs on which are mounted to revolve bending rolls 23 which are retained in position by means of nuts 24. The studs 22 as illustrated are in alinement so that an upper and a lower bending roll is provided, it being of course understood that any desired number of such bending rolls may be employed. The rolls are rounded as at 25 to suit the fillet of the angle bar which is to be bent. .26 designates a die which is shown as being of annular formation and provided with a base flange 27, a step 28 and a slot 29. The die is secured to the rotary table 2 by means of fastening devices 80 of any desired type.

31 designates the angle bar. Each bending roll is provided with an annular exten sion or shoulder 32 which engages the base flange of the angle bar.

In the operation, the die 26 is first secured on the rotary table 2. The carriage 12 is laterally positioned by proper actuation of the feed screw 9. The angle bar is heated and one end of it is inserted in the slot 29. The position of the lower roll 23 has prior to this been adjusted to bring it into a position to contact with the angle bar by actuating the shaft 17 in the proper direction to cause the pinion 14 to move the rack 13 and the slide 12 downwardly. The table 2 is revolved to cause the angle bar to be bent into a formation corresponding to the contour of the die employed. The vertical flange and fillet of the angle bar is engaged by the'periphery and rounded shoulder 25, respectively, of the bending roll, and the base flange is engaged by the annular shoulder 32. I

i Vhen, in the operation of bending, one roll, becomes overheated from contact with the heated angle bars the nut 21 is loosened and the tool carrying head rotated to bring the other bending roll into operative position. The nut 21 is then tightened and the bending operation repeated as described. The step of the die is such that the base flange of the angle bar will have proper support on it, thereby preventing the buckling of the outstanding leg of the die to which the angle bar conforms.

It will be apparent from the foregoing that in my present invention I employ a plurality of bending rolls two of which are shown in the accompanying drawings in orderthatan alternate use of the rolls may be employed so that when one roll becomes overheated due to contact with the heated angle bar the other roll may be brought into operative position to engage the angle bars and effect in COIlJLlllClilOll with the die the bending of the angle bar in conformity to.

the contour of the die.

the employment of such construction it is not necessary at any time to wait for a roll to cool off since as soon as a roll becocrnes overheated another one is brought into its proper operative position.

Having thus described my inventiomwhat I claim as new and desire to secure by Letters Patent, is:

z ically and horizontally, a shaft projecting t rally from said slide, a tool head rotaany mounted on said shaft, bending rolls rotatably mounted on the ends of said head, and means on said tool head shaft for effecting the locking of said tool head and the rollers thereon in the desired position.

2. in a bending machine, a base, a rotary table supported thereon, a die on said table, a carriage above said table, means to laterally adjust the position of said carriage, a slide on said carriage, means to vertically adjust the position of said slide, arotatable tool carrying head, a bending r ll 'otatably mounted on each end of said head,

shaft projecting laterally from said slide on which said head is rotatably mounted and ustable means for securing said head in fixed position on said shaft.

in an angle bending machlne, a rotary table, an annular stepped die thereon havwith an outer annular shoulder to engage SAMUEL 1). screen itnesses:

Maurice Asian, F. C. KoBELY. 

